Table 3.
Speciated VOC concentrations (μg/m3) on each study day, averaged across rooms.
| Analyte | Condition | ||||||
|---|---|---|---|---|---|---|---|
| Background | Day 1 Green+ | Day 2 Med. CO2 | Day 3 High CO2 | Day 4 Green | Day 5 Conventional | Day 6 Green+ | |
| VOCs | |||||||
| 1,2,4-Trimethylbenzene | 0.3 | 0.2 | ND | 0.1 | ND | 0.5 | 0.1 |
| 2-Butanone | 2.5 | 0.7 | 0.7 | 0.8 | 1.1 | 1.1 | 0.6 |
| 2-Propanol | 1.0 | 1.2 | 1.1 | 3.1 | 1.2 | 312.5 | 8.2 |
| Acetone | 12.0 | 14.7 | 9.6 | 8.7 | 20.0 | 20.0 | 8.6 |
| Benzene | 0.5 | 0.8 | 0.5 | 0.9 | 0.7 | 0.5 | 0.5 |
| Carbon disulfide | 0.6 | 0.2 | ND | ND | ND | ND | 0.1 |
| Carbon tetrachloride | ND | 0.2 | 0.4 | ND | 0.2 | ND | ND |
| Chloroform | ND | 0.1 | ND | ND | ND | 0.1 | ND |
| Chloromethane | 1.3 | 1.7 | 1.5 | 1.4 | 1.9 | 1.5 | 1.4 |
| Cyclohexane | 0.2 | 0.3 | 0.4 | 0.5 | 0.1 | 0.4 | 0.3 |
| Dichlorodifluoromethane | 2.5 | 2.6 | 2.9 | 2.7 | 2.9 | 2.4 | 2.5 |
| Ethyl acetate | ND | ND | ND | ND | 1.0 | 2.0 | ND |
| Ethylbenzene | 0.3 | 0.4 | ND | 0.3 | 0.2 | 0.1 | 0.1 |
| Freon 113 | 0.3 | 0.7 | 0.8 | 0.8 | 0.8 | 0.2 | 0.4 |
| Heptane | ND | 0.3 | ND | 0.3 | ND | 257.5 | 6.9 |
| Hexane | 0.4 | 0.7 | 0.5 | 0.7 | 0.4 | 0.8 | 1.3 |
| m,p-Xylene | 0.8 | 1.5 | 0.4 | 1.0 | 1.0 | 0.7 | 0.7 |
| Methylene chloride | 0.5 | 0.3 | 0.6 | 0.5 | 0.3 | 0.4 | 0.4 |
| o-Xylene | 0.3 | 0.4 | ND | 0.4 | 0.1 | 0.3 | 0.1 |
| Styrene | 0.1 | ND | ND | ND | ND | ND | 0.1 |
| Tetrachloroethene | 3.7 | 0.9 | ND | ND | 0.9 | 0.6 | 0.2 |
| Tetrahydrofuran | ND | ND | ND | ND | 0.2 | 0.1 | 0.2 |
| Toluene | 2.4 | 2.1 | 1.4 | 1.9 | 2.2 | 1.9 | 2.9 |
| trans-1,2-Dichloroethene | 19.0 | 8.8 | 12.6 | 6.2 | 10.3 | 21.8 | 8.7 |
| Trichloroethene | ND | ND | ND | ND | ND | ND | 0.2 |
| Trichlorofluoromethane | 1.3 | 1.2 | 1.6 | 1.4 | 1.5 | 1.1 | 1.2 |
| Grand total | 50.0 | 40.1 | 35.0 | 31.4 | 46.9 | 626.4 | 45.6 |
| Aldehydes | |||||||
| 2,5-Dimethylbenzaldehyde | ND | ND | ND | ND | ND | ND | ND |
| Acetaldehyde | 1.0 | 3.7 | 3.2 | 3.1 | 5.4 | 7.3 | 2.1 |
| Benzaldehyde | ND | ND | ND | ND | ND | 1.5 | ND |
| Crotonaldehyde | ND | ND | ND | ND | ND | ND | ND |
| Formaldehyde | 2.4 | 5.9 | 5.5 | 5.4 | 8.9 | 11.7 | 4.4 |
| Hexanaldehyde | ND | 0.8 | 0.8 | ND | 1.9 | 2.4 | ND |
| Isovaleraldehyde | ND | ND | ND | ND | ND | ND | ND |
| m,p-Tolualdehyde | ND | ND | ND | ND | ND | ND | ND |
| n-Butyraldehyde | 1.1 | 2.7 | 1.4 | 2.3 | 2.8 | 2.4 | 2.0 |
| o-Tolualdehyde | ND | ND | ND | ND | ND | ND | ND |
| Propionaldehyde | ND | 0.7 | 1.2 | ND | 1.4 | 1.6 | 0.6 |
| Valeraldehyde | ND | ND | ND | ND | ND | ND | ND |
| Glutaraldehyde | ND | 0.5 | ND | ND | 0.4 | ND | ND |
| o-Phthalaldehyde | ND | 65.1 | 57.7 | 70.0 | 41.6 | 38.4 | 76.8 |
| Grand total | 4.6 | 79.4 | 69.8 | 80.9 | 62.4 | 65.3 | 85.8 |
| Abbreviations: ND, non-detect; VOC, volatile organic compound. | |||||||